Downgrading docker image to eclipse java temurin 17

.github/workflows/build_and_test.yml

@@ -262,31 +262,6 @@ jobs:
           path: |
             rskj-core/build/reports/
 
-  unit-tests-java21:
-    needs: build
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 #v4.2.1
-
-      - name: Setup Java & Gradle
-        uses: actions/setup-java@b36c23c0d998641eff861008f374ee103c25ac73 #v4.4.0
-        with:
-          java-version: '21'
-          distribution: 'temurin'
-          cache: 'gradle'
-
-      - uses: actions/cache/restore@3624ceb22c1c5a301c8db4169662070a689d9ea8 #v4.1.1
-        name: Restore Gradle Wrapper
-        with:
-          path: |
-            gradle/wrapper/gradle-wrapper.jar
-          key: gradle-wrapper-v1
-          fail-on-cache-miss: true
-
-      - name: Run tests
-        run: |
-          ./gradlew --no-daemon --stacktrace test
-
   integration-tests:
     needs: build
     runs-on: ubuntu-latest

Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipse-temurin:21-jdk@sha256:5ad4efff3364b06c61578b267138359bcba92acc20dfd533f35b75c709a6f10b AS build
+FROM eclipse-temurin:17-jdk@sha256:0613a19436dc8f745914b25235d43f3b0eddb8d432d19edce30ffaf2d2f95403 AS build
 
 RUN apt-get update -y && \
     apt-get install -y git curl gnupg
@@ -19,7 +19,7 @@ RUN gpg --keyserver https://secchannel.rsk.co/SUPPORT.asc --recv-keys 1DC9157991
     modifier=$(sed -n 's/^modifier=//p' "$file" | tr -d "\"'") && \
     cp "rskj-core/build/libs/rskj-core-$version_number-$modifier-all.jar" rsk.jar
 
-FROM eclipse-temurin:21-jre@sha256:4c1ec9743c333c9d47f55d883c4e317d117e198899e7edf1d9cf4c89253b1b9d
+FROM eclipse-temurin:17-jre@sha256:38e0afc86a10bf4cadbf1586fb617b3a9a4d09c9a0be882e29ada4ed0895fc84
 LABEL org.opencontainers.image.authors="ops@rootstocklabs.com"
 
 RUN useradd -ms /sbin/nologin -d /var/lib/rsk rsk

rskj-core/src/main/java/co/rsk/util/PreflightChecksUtils.java

@@ -28,7 +28,7 @@ public class PreflightChecksUtils {
     private static final Logger logger = LoggerFactory.getLogger(PreflightChecksUtils.class);
 
     public static final Set<Integer> SUPPORTED_JAVA_VERSIONS = Collections.unmodifiableSet(
-            new TreeSet<>(Arrays.asList(17, 21))
+            new TreeSet<>(Arrays.asList(17))
     );
 
     private final RskContext rskContext;

rskj-core/src/main/resources/version.properties

@@ -1,2 +1,2 @@
-versionNumber='6.5.0'
+versionNumber='6.5.1'
 modifier="ARROWHEAD"

rskj-core/src/test/java/co/rsk/util/PreflightChecksUtilsTest.java

@@ -71,7 +71,7 @@ void runChecks_invalidJavaVersion_exceptionIsThrown() {
 
     @Test
     void runChecks_runAllChecks_OK() throws Exception {
-        for (String ver : Arrays.asList("17.0.3", "21.0.1")) {
+        for (String ver : Arrays.asList("17.0.3")) {
             try (RskContext rskContext = new RskTestContext(tempDir)) {
                 PreflightChecksUtils preflightChecksUtilsSpy = spy(new PreflightChecksUtils(rskContext));